Last name ניקולאיה (Nicolae 
, ניקולאיה 
) , in all the world, is a common cognomen. The last name ניקולאיה is characteristic of Romania, where it is a common surname, Moldova, and Cyprus, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Romania, Moldova, and Spain. More frequently, ניקולאיה is the forename as well as the last name.